Дайте название элементу структуры объекта, необходимому для выполнения объектом требуемых функций при отсутствии отказов его элементов

- Hello , can i help you?

- Yes, I would like to buy a scarf.

-All our sraves are over here. Take a look, what do you think of this silk scarf?

 - It is really nice, but i would like to have somethinhg warmer for the winter.

- And what about this one? It is made of wool.

-Yes, I like it. It looks nice and seems to be very warm.  How much is it?

- It is 56 dollars

-It is a little expensive for me. Can I get a discount?

-Well, I think you can have about a 10 percent discount.